This book constructs a general economic theory to analyze how different economic forces interact over time. It proposes some new combinations of various economic forces which may function at various stages of social and economic evolution. The theory includes the main economic ideas of Smith, Malthus, Ricardo, Marx, Mills, Walras, Marshall, Schumpeter and Keynes. It also includes, as special cases, the well-established mathematical models, such as the Arrow-Debreu general equilibrium model, the Tobin model, the Solow-Swan-Uzawa growth model, the Kaldor-Pasinetti two-class model, the Ricardian models by Morishima, Samuelson and Pasinetti, Keynesian theory, to explain certain economic phenomena which cannot be explained by traditional works.